<!--  -->
<template>
    <div>B {{ count }}
      <el-button @click="count++">++</el-button>
    </div>
  </template>
  
  <script lang='ts' setup>
  import { reactive,toRefs,ref,onMounted} from 'vue'
  const count=ref(0);
  </script>
  <style scoped>
  </style>